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United States Patent |
6,179,011
|
de Jager
|
January 30, 2001
|
Apparatus for the insertion of weft threads for a series shed weaving
machine and a series shed weaving machine with an apparatus
Abstract
An apparatus for the insertion of weft threads contains a stationary unit
having an arrangement with a plurality of passages, a plurality of nozzles
for the supplying of weft threads and a unit which rotates with the
weaving rotor with a plurality of injector nozzles which are intended to
successively draw off the weft threads which are supplied to the passages
and to feed them into the shed.
Inventors:
|
de Jager; Godert (Volketswil, CH)
|
Assignee:
|
Sulzer Rueti AG (Rueti, CH)
|
Appl. No.:
|
365433 |
Filed:
|
August 2, 1999 |
Foreign Application Priority Data
Current U.S. Class: |
139/28; 139/450 |
Intern'l Class: |
D03D 047/30; D03D 047/00 |
Field of Search: |
139/28,450,435.1
|
References Cited
U.S. Patent Documents
4592393 | Jun., 1986 | Steiner | 139/28.
|
5146955 | Sep., 1992 | Steiner et al. | 139/28.
|
5406985 | Apr., 1995 | Christe | 139/28.
|
5439037 | Aug., 1995 | Christe | 139/28.
|
5632308 | May., 1997 | Bucher et al. | 139/28.
|
5937913 | Aug., 1999 | Christe | 139/28.
|
Foreign Patent Documents |
0143860A1 | Jun., 1985 | EP.
| |
0433216A1 | Jun., 1991 | EP.
| |
0685584A1 | Dec., 1995 | EP.
| |
Primary Examiner: Falik; Andy
Attorney, Agent or Firm: Townsend and Townsend and Crew LLP
Claims
What is claimed is:
1. An apparatus for the insertion of weft threads into a series shed
weaving machine comprising a weaving rotor having weft insertion passages,
said apparatus having a stationary unit with a plurality of passages and
with a plurality of nozzles for the insertion of the weft threads and a
unit which is arranged to rotate with the weaving rotor in order to feed
the weft threads into the weft insertion passages, wherein the plurality
of nozzles are provided at the unit which rotates with the weaving rotor
in order to draw off the weft threads which are supplied to the passages
and to insert them into the weft insertion passages.
2. An apparatus in accordance with claim 1 wherein a plurality of second
nozzles are provided which are arranged at the stationary unit in order to
forward the weft threads into the passages, with the weft threads of a
supply unit being either continuously or discontinuously supplied to the
second nozzles.
3. An apparatus in accordance with claim 1 wherein the stationary unit has
a holder and an arrangement of passages with the passages forming an arch
and being substantially concentrically arranged at the holder.
4. An apparatus in accordance with claim 1 wherein second units which form
the passages and which are arranged in the manner of a fan are provided.
5. An apparatus in accordance with claim 1 wherein the passage comprises a
transport passage and a draw-out passage.
6. An apparatus in accordance with claim 5 wherein the transport passage
has an open width which is greater than the open width of the draw-out
passage.
7. An apparatus in accordance with claim 1 wherein the passages are
collected into a component, with each passage having at least one inlet
and with all passages opening into a common outlet.
8. An apparatus in accordance with claim 7 wherein the component contains a
number of second units; and wherein the component consists of a first
section with the passages and a second section into which the passages
open and which has an opening.
9. An apparatus in accordance with claim 7 wherein the passages are
subdivided into groups; and wherein the component has at least one group
of passages.
10. An apparatus in accordance with claim 1 wherein the passage has a
cross-section which contracts in the direction towards the open
longitudinal side.
11. An apparatus in accordance with claim 7 further comprising an auxiliary
nozzle which is arranged into the second section of the component in such
a manner that the opening of the auxiliary nozzle is directed towards the
opening.
12. An apparatus in accordance with claim 1 wherein the plurality of
nozzles are arranged at equal angular spacings on a common pitch circle.
13. A series shed weaving machine comprising an apparatus for the insertion
of weft threads, and a weaving rotor having weft insertion passages, the
apparatus having a stationary unit with a plurality of passages and with a
plurality of nozzles for the insertion of the weft threads and a unit that
is arranged to rotate with the weaving rotor in order to feed the weft
threads into the weft insertion passages, wherein the plurality of nozzles
are provided at the unit which rotates the weaving rotor in order to draw
off the weft threads which are supplied to the passages and to insert them
into the weft insertion passages.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to of weft threads in accordance with the preamble of
claim 1 and to a series shed weaving machine with an apparatus.
2. Description of the Prior Art
An apparatus is described in EP-A-0 433 216 for the distribution of the
weft threads from a thread supply device to a plurality of insertion
passages of a weaving rotor of a series shed weaving machine which
contains a stationary part, and a part which rotates with the weaving
rotor which have a common separation and sealing surface in a rotationally
symmetrical surface and via which the transfer of the weft threads takes
place. In the stationary part passages are formed in a known arrangement
and nozzles are provided for each passage in order to draw off the weft
threads from a device which supplies the weft threads and to introduce
them into the respective passage. In the part which rotates with the
weaving rotor, acceptor passages are formed in a known arrangement and
shoot-in tubes are provided in order to shoot the weft threads which are
supplied by the nozzles into the weft passages which are formed at the
weaving rotor.
The disadvantages of this apparatus are essentially to be seen wherein the
gap between the stationary part and the part which rotates with the
weaving rotor is made very narrow in order to ensure the forwarding of the
weft threads to the weaving rotor, in that the nozzle which is associated
with each passage must drive the start of the weft thread through the
passage up to the relay nozzles in the weaving rotor; and wherein as a
result of the constitution of the yarn, thread parts, e.g. fibrils can
penetrate into the gap between the stationary part and the part which
rotates with the weaving rotor. A substantial restriction of the types of
yarn which can be woven on the weaving machine results from this.
SUMMARY OF THE INVENTION
The object of the invention is to improve an apparatus of this kind.
Because the weft threads are prepared in a stationary unit with supply
nozzles and are shot into the weft passages by means of a unit with
injector nozzles which rotates with the weaving rotor, there results the
advantage that different yarn sorts, in particular also filament yarns,
can be shot into the weft passage in a disturbance-free manner.
The weaving machine has the advantage that as a result of a discontinuous
supply of the weft threads there exists the possibility of selecting the
available weft yarn freely and in accordance with a predetermined program
for the weft insertion.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side view of an embodiment of an apparatus in accordance with
the invention;
FIG. 2 is a schematic illustration of the stationary unit and the rotating
unit in accordance with FIG. 1 at the beginning of the weft insertion;
FIG. 3 is an embodiment of a component with a passage arrangement in
accordance with the invention in a spatial illustration;
FIG. 4 is the component in accordance with FIG. 3 in an extended
illustration;
FIG. 6 is a second embodiment of a component with a passage arrangement in
accordance with the invention in a spatial illustration;
FIG. 7 is a section along the line VII--VII in FIG. 6;
FIG. 8 is a cross-section of another embodiment of a passage arrangement;
FIG. 9 is a cross-section of a further embodiment of a passage arrangement;
FIG. 10 is cross-sections of passages;
FIG. 11 is an embodiment of a device for the continuous supplying of weft
threads and
FIG. 12 is an embodiment of a device for the discontinuous supplying of
weft threads
DETAILED DESCRIPTION OF THE PREFERRED EXEMPLARY EMBODIMENTS
FIG. 1 shows a weaving rotor 1 and an apparatus 2 in accordance with the
invention for the insertion of weft threads 3 for a series shed weaving
machine.
The apparatus 2 comprises a stationary unit 4 for the supplying of the weft
threads, a unit 5 for feeding in the weft threads which rotates
synchronously with the weaving rotor 1 about the axis of rotation 6 in the
direction of the arrow A, and a rotary slide valve 7 for the supplying of
the air. The unit 4 for the supplying of the weft threads has a holder 8
for an arrangement 11 of passages. The unit 5 for the feeding in of the
weft threads has twelve injector nozzles 12 which are arranged on a
cylindrical carrier part 13. The carrier part contains a first ring-shaped
section 14 for the nozzle bodies and a second ring-shaped section 15 for
the nozzle mouths. It is pointed out that the nozzles can be arranged in a
common section and that the number of nozzles can vary.
Reference is made to FIGS. 2 to 4. As FIG. 2 shows (in a folded out
illustration), the apparatus contains the stationary unit 4 for the
supplying of the weft threads and a unit 5 for feeding in the weft threads
which rotates synchronously with the weaving rotor 1. The unit 4 for the
supplying of the weft threads 3 contains a holder 21 and an arrangement 22
which is mounted on the holder. The unit 5 for the feeding in of the weft
threads 3 comprises a cylindrical carrier part 23 and twelve injector
nozzles 12, the inlet and outlet of which lie on the same pitch circle 24.
As FIG. 3 shows, the arrangement 22 comprises four units 25 which form
passages 26 and are arranged in the manner of a fan. A component 27
consists of a first section 28 with the units 25 and a second section 29
which is connected to the units and which has an opening 30. A nozzle 31
for the supplying of a weft thread is associated with each passage 26.
Each passage 26 has a cross-section which continuously contracts in the
direction of the axis of rotation 6 so that a gap 32 for the drawing out
of the weft thread is formed.
The injector nozzles 12 are arranged to lie at equal distances on a pitch
circle 41 in such a manner that the inlet of the injector nozzle and the
opening 30 of the section 29 are directed towards one another during the
takeover of a weft thread 3. The inlet of the injector nozzle is
advantageously expanded in the shape of a funnel in order to ensure the
acceptance of the weft thread.
FIG. 4 shows the component 27 in accordance with FIG. 3 in an extended
illustration. In order to reduce the stressing of the weft threads during
the drawing out from the passage 26 and the insertion into the shed it can
be advantageous to design the depth of the passage 26 differently in
accordance with the illustration.
Reference is made to FIGS. 6 and 7. These figures show another embodiment
of the arrangement with four units 42 which form two passages 43 each and
are arranged in the manner of a fan. The arrangement is designed as a
component 44 and consists of a first section 45 with the units 42 and a
second section 46 which is connected to the units and has an opening 47. A
nozzle 48 for the supplying of a weft thread is associated with each
passage 43. The two passages 43 of each unit are separated by an
intermediate wall 49 and form a common gap 50 in order to draw out a weft
thread. Furthermore, an auxiliary nozzle 51 is provided which is arranged
in the second section 46 of the component 44 in such a manner that the
opening of the auxiliary nozzle is directed towards the opening 47.
FIG. 8 shows a unit 61 with four passages 43. It is pointed out that the
number of the passages 43 can vary.
FIG. 9 shows eight units 62 which in each case form a passage 63, with each
passage consisting of a transport passage 64 and a draw-out passage 65.
FIG. 10 shows cross-sectional forms of embodiments of units, with each
passage consisting of a transport passage 66 and a draw-out passage 67.
FIG. 11 shows a device 71 for the continuous supplying of weft threads 3
with a thread forwarding apparatus 72 for each nozzle 31.
FIG. 12 shows a device 81 for the discontinuous, i.e. selective supplying
of weft threads 3 with a thread storage 82 for each nozzle 31, with the
thread storage being provided with a thread stopping member 83.
The apparatus contains a stationary unit 4 having an arrangement 22 with a
plurality of passages 26 and with a plurality of nozzles 31 for the
supplying of weft threads 3 and a unit 5 which rotates with the weaving
rotor 1 with a plurality of injector nozzles 12 which are intended to
successively draw off the weft threads which are supplied to the passages
and to feed them into the shed.
This apparatus ensures the insertion of weft threads of different kinds and
embodiments.
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